CN114851900A - Control method, system, medium and device for charging and replacing power station and charging and replacing power station - Google Patents

Control method, system, medium and device for charging and replacing power station and charging and replacing power station Download PDF

Info

Publication number
CN114851900A
CN114851900A CN202210471310.6A CN202210471310A CN114851900A CN 114851900 A CN114851900 A CN 114851900A CN 202210471310 A CN202210471310 A CN 202210471310A CN 114851900 A CN114851900 A CN 114851900A
Authority
CN
China
Prior art keywords
discharge
battery
power
charging
dischargeable
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
CN202210471310.6A
Other languages
Chinese (zh)
Inventor
赵金程
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Weilai Automobile Technology Anhui Co Ltd
Original Assignee
Weilai Automobile Technology Anhui Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Weilai Automobile Technology Anhui Co Ltd filed Critical Weilai Automobile Technology Anhui Co Ltd
Priority to CN202210471310.6A priority Critical patent/CN114851900A/en
Publication of CN114851900A publication Critical patent/CN114851900A/en
Pending legal-status Critical Current

Links

Images

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60L—PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES; SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
    • B60L53/00—Methods of charging batteries, specially adapted for electric vehicles; Charging stations or on-board charging equipment therefor; Exchange of energy storage elements in electric vehicles
    • B60L53/80—Exchanging energy storage elements, e.g. removable batteries
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60L—PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES; SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
    • B60L53/00—Methods of charging batteries, specially adapted for electric vehicles; Charging stations or on-board charging equipment therefor; Exchange of energy storage elements in electric vehicles
    • B60L53/30—Constructional details of charging stations
    • B60L53/31—Charging columns specially adapted for electric vehicles
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60L—PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES; SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
    • B60L53/00—Methods of charging batteries, specially adapted for electric vehicles; Charging stations or on-board charging equipment therefor; Exchange of energy storage elements in electric vehicles
    • B60L53/60—Monitoring or controlling charging stations
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
    • H02J3/00—Circuit arrangements for ac mains or ac distribution networks
    • H02J3/28—Arrangements for balancing of the load in a network by storage of energy
    • H02J3/32—Arrangements for balancing of the load in a network by storage of energy using batteries with converting means
    • H02J3/322—Arrangements for balancing of the load in a network by storage of energy using batteries with converting means the battery being on-board an electric or hybrid vehicle, e.g. vehicle to grid arrangements [V2G], power aggregation, use of the battery for network load balancing, coordinated or cooperative battery charging
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
    • H02J2310/00—The network for supplying or distributing electric power characterised by its spatial reach or by the load
    • H02J2310/40—The network being an on-board power network, i.e. within a vehicle
    • H02J2310/48—The network being an on-board power network, i.e. within a vehicle for electric vehicles [EV] or hybrid vehicles [HEV]
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
    • Y02T10/00—Road transport of goods or passengers
    • Y02T10/60—Other road transportation technologies with climate change mitigation effect
    • Y02T10/70—Energy storage systems for electromobility, e.g. batteries
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
    • Y02T10/00—Road transport of goods or passengers
    • Y02T10/60—Other road transportation technologies with climate change mitigation effect
    • Y02T10/7072—Electromobility specific charging systems or methods for batteries, ultracapacitors, supercapacitors or double-layer capacitors
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
    • Y02T90/00—Enabling technologies or technologies with a potential or indirect contribution to GHG emissions mitigation
    • Y02T90/10—Technologies relating to charging of electric vehicles
    • Y02T90/12—Electric charging stations

Landscapes

  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Transportation (AREA)
  • Mechanical Engineering (AREA)
  • Charge And Discharge Circuits For Batteries Or The Like (AREA)
  • Secondary Cells (AREA)

Abstract

The invention relates to the technical field of battery charging and replacing, in particular to a control method, a system, a medium and a device for a battery charging and replacing station and the battery charging and replacing station. The problem of the unable fully provided power consumption demand of electric wire netting of trading power station is filled to the solution. To this end, the control method of the present application includes: acquiring discharge demand information, and determining demand electric energy based on the discharge demand information; calculating total discharge electric energy which can be provided by all dischargeable batteries in the charging and replacing station; comparing the required electric energy with the total discharge electric energy; when the required electric energy is larger than the total discharge electric energy, reverse battery replacement requirement information is sent outwards so that a vehicle responding to the reverse battery replacement requirement information arrives at a battery charging and replacing station to perform reverse battery replacement; determining a first discharge power of each dischargeable battery based on the discharge demand information and the first allocation strategy; and controlling each dischargeable battery to discharge outwards according to the respective first discharge power. The external continuous discharge of the charging and replacing power station can be realized by utilizing the reverse charging and replacing function of the charging and replacing power station.

Description

Control method, system, medium and device for charging and replacing power station and charging and replacing power station
Technical Field
The invention relates to the technical field of battery charging and replacing, in particular to a control method, a system, a medium and a device for a battery charging and replacing station and the battery charging and replacing station.
Background
At present, electric vehicles are developed rapidly, consumers tend to select electric vehicles more and more, and along with the continuous increase of the holding capacity of the electric vehicles, the demand on electric vehicle power-on equipment is also increased correspondingly. As a quick energy supplementing scheme, the charging and replacing power station can realize electric energy supplement in a short time, so that the charging and the refueling are convenient, and the charging and replacing power station is popular with electric automobile users.
Because a plurality of power batteries are stored in the charging and replacing power station, the charging and replacing power station can improve the utilization rate of the charging and replacing power station by expanding other functions besides providing the rapid energy supplementing service, and the operation cost is reduced. For example, the purpose of peak clipping and valley filling of the power grid can be achieved by utilizing the discharging and grid connection of power batteries in the charging and replacing power station. However, the current charging and replacing power station has a limited discharge capacity, and cannot fully meet the power demand of the power grid. The same problem occurs in the energy storage station.
Accordingly, there is a need in the art for a new solution to the above problems.
Disclosure of Invention
In order to solve at least one of the above problems in the prior art, that is, in order to solve the problem that the charging and replacing station cannot sufficiently meet the power demand of the power grid, the present application provides a control method for a charging and replacing station, which includes a replacing unit and a plurality of battery compartments, the battery compartments are used for charging and discharging batteries, the replacing unit is used for replacing batteries for vehicles, the battery compartments are connected with a power consumption part through a bidirectional charging and discharging module,
the control method comprises the following steps:
acquiring discharge demand information, and determining demand electric energy based on the discharge demand information;
calculating total discharge electric energy which can be provided by all dischargeable batteries in the charging and replacing station;
comparing the required electric energy with the total discharge electric energy;
when the required electric energy is larger than the total discharge electric energy, reverse battery replacement requirement information is sent outwards so that a vehicle responding to the reverse battery replacement requirement information arrives at the battery charging and replacing station to perform reverse battery replacement;
determining a first discharge power of each dischargeable battery based on the discharge demand information and a first allocation strategy;
and controlling each dischargeable battery to discharge outwards according to the respective first discharge power.
In a preferred technical solution of the control method for a charging and swapping station, the first allocation policy is:
when all the dischargeable batteries are discharged externally with respective first discharge power, the batteries can be discharged from the current charge state to a discharge cut-off charge state sequentially according to equal preset interval duration;
and the preset interval duration is longer than the duration required by reverse battery replacement of the vehicle.
In a preferable technical solution of the control method for a charging and replacing power station, the control method further includes:
calculating an electric energy gap according to the required electric energy and the total discharge electric energy;
calculating the fastest discharge time of all dischargeable batteries from the current charge state to the discharge cut-off charge state at respective first discharge power;
calculating the required number of vehicles needing reverse battery replacement and the required battery replacement time of each vehicle needing to arrive based on the electric energy notch and the fastest discharge time;
the step of sending the reverse battery replacement requirement information outwards further comprises the following steps:
and sending the required quantity and the required battery replacement time outwards.
In an optimal technical scheme of the control method of the charging and replacing power station, the required charging time is determined based on the fastest discharging time and the preset interval duration.
In a preferable technical solution of the control method for a charging and replacing power station, the control method further includes:
acquiring state parameters of a vehicle, and calculating first estimated arrival time of the vehicle based on the state parameters;
determining suggested power change time based on the first estimated arrival time and the required power change time;
and sending out a response suggestion based on the suggested battery replacement time.
In a preferable technical solution of the control method for a charging and replacing power station, the control method further includes:
acquiring demand response information, and determining second estimated arrival time of the next arrival vehicle;
adjusting a first discharge power of each dischargeable battery based on the second estimated arrival time.
In a preferred embodiment of the control method for a charging and replacing power station, the step of adjusting the first discharging power of each dischargeable battery based on the second estimated arrival time further includes:
judging whether the second estimated arrival time is later than the fastest discharge time;
if yes, adjusting the first discharging power of each dischargeable battery based on the second estimated arrival time.
In a preferred embodiment of the control method for a charging and replacing power station, the step of "adjusting the first discharging power of each dischargeable battery based on the second estimated arrival time" further includes:
adjusting the first discharge power by the following formula:
P1_i＝(SOC_i-SOC_end)×Qrated_i/[T1+(i-1)ΔT-Tn]
wherein, P1 — i is the first discharge power of the ith dischargeable battery; SOC _ i is the current state of charge of the ith dischargeable battery; SOC _ end is the discharge cutoff state of charge of the dischargeable battery; qrated _ i is the rated capacity of the i-th dischargeable battery; t1 is the second estimated arrival time; tn is the current time; delta T is a preset interval duration; n, n is the number of dischargeable cells.
In a preferred embodiment of the control method for a charging and replacing power station, after the step of "adjusting the first discharging power of each dischargeable battery", the control method further includes:
adjusting the required battery replacement time based on the second estimated arrival time; and/or
Estimating a remaining capacity of the vehicle when the vehicle reaches the charging and replacing station, and adjusting the required quantity based on the remaining capacity.
In a preferred technical solution of the control method for a charging and replacing power station, the discharge requirement information includes required power and required duration, and the control method further includes:
when the required electric energy is less than or equal to the total discharge electric energy, determining a second discharge power of each dischargeable battery based on the required power and a second distribution strategy;
controlling each dischargeable battery to discharge externally according to respective second discharge power;
judging whether the total discharge time reaches the required time;
and when the discharge time reaches the required time, controlling each dischargeable battery to finish discharging.
In a preferable technical solution of the control method for a charging and replacing power station, the control method further includes:
calculating the maximum output total power of all dischargeable batteries in the charging and replacing power station;
calculating a sustainable discharge power based on the maximum total output power;
reporting the sustainable discharge power;
wherein the sustainable discharge power is less than the maximum total output power.
In a preferable technical solution of the control method for a charging and replacing power station, the control method further includes:
when one dischargeable battery is discharged from the current charge state to the discharge cut-off charge state, the first discharge power of all other dischargeable batteries is increased;
and controlling the battery replacement unit to replace the battery on the vehicle with the battery discharged to the discharge cut-off state of charge.
The proposal also provides a control system of the charging and replacing station, the charging and replacing station comprises a battery replacing unit and a plurality of battery bins, the battery bins are used for charging and discharging the battery, the battery replacing unit is used for replacing the battery for the vehicle, the battery bins are connected with the power utilization part through a bidirectional charging and discharging module,
the control system includes:
an acquisition module configured to acquire discharge demand information;
a determination module configured to determine a required electric energy based on the discharge demand information;
a calculation module configured to calculate a total discharge electrical energy that all dischargeable batteries within the charging and replacing station are capable of providing;
a comparison module configured to compare the required electrical energy with the total discharge electrical energy;
a sending module configured to send reverse battery replacement demand information outwards when the required electric energy is greater than the total discharge electric energy, so that a vehicle responding to the reverse battery replacement demand information enters the battery charging and replacing station for reverse battery replacement;
the determination module is further configured to determine a first discharge power of each dischargeable battery based on the discharge demand information and a first allocation policy;
a control module configured to control each dischargeable battery to discharge outward at a respective first discharge power.
In a preferred technical solution of the control system of the charging and swapping station, the first allocation policy is:
when all the dischargeable batteries are discharged externally with respective first discharge power, the batteries can be discharged from the current charge state to a discharge cut-off charge state sequentially according to equal preset interval duration;
and the preset interval duration is longer than the duration required by reverse battery replacement of the vehicle.
In a preferred technical solution of the control system of the charging and replacing station, the calculation module is further configured to calculate an electric energy gap according to the required electric energy and the total discharging electric energy, and calculate a fastest discharging time for all the dischargeable batteries to be discharged from a current state of charge to a discharging cutoff state of charge at respective first discharging powers; calculating the required number of vehicles needing reverse battery replacement and the required battery replacement time required by each vehicle to arrive based on the electric energy notch and the fastest discharge time;
the sending module is further configured to send the required quantity and the required battery replacement time outwards.
In an optimal technical solution of the control system of the charging and replacing power station, the required charging time is determined based on the fastest discharging time and the preset interval duration.
In a preferred technical solution of the control system of the charging and replacing power station, the obtaining module is further configured to obtain a state parameter of a vehicle;
the calculation module is further configured to calculate a first estimated arrival time of the vehicle based on the state parameter;
the determination module is further configured to determine a suggested power change time based on the first estimated arrival time and the required power change time;
the sending module is further configured to send out a response suggestion based on the suggested battery swapping time.
In a preferred technical solution of the control system of the charging and replacing power station, the obtaining module is further configured to obtain demand response information;
the determination module is further configured to determine a second estimated arrival time of a next arriving vehicle;
the control module is further configured to adjust a first discharge power of each dischargeable battery based on the second estimated arrival time.
In a preferred technical solution of the control system of the charging and replacing power station, the control module is further configured to adjust the first discharging power of each dischargeable battery based on the second estimated arrival time by:
judging whether the estimated arrival time is later than the fastest discharge time;
if so, adjusting the first discharge power of each dischargeable battery based on the second estimated arrival time.
In a preferred technical solution of the control system of the charging and replacing power station, the control module is further configured to adjust the first discharging power of each dischargeable battery based on the second estimated arrival time by:
adjusting the first discharge power by the following formula:
P1_i＝(SOC_i-SOC_end)×Qrated_i/[T1+(i-1)ΔT-Tn]
wherein, P1 — i is the first discharge power of the ith dischargeable battery; SOC _ i is the current state of charge of the ith dischargeable battery; SOC _ end is the discharge cutoff state of charge of the dischargeable battery; qrated _ i is the rated capacity of the i-th dischargeable battery; t1 is the second estimated arrival time; tn is the current time; delta T is a preset interval duration; n, n is the number of dischargeable cells.
In a preferred technical solution of the control system of the charging and swapping station, the control module is further configured to adjust the required swapping time based on the second estimated arrival time; and/or
The calculation module is further configured to estimate a remaining capacity of the vehicle when the vehicle reaches the charging station, and the control module is further configured to adjust the required amount based on the remaining capacity.
In a preferred technical solution of the control system of the charging and replacing station, the discharge requirement information includes a required power and a required time,
the determination module is further configured to determine a second discharge power of each dischargeable battery based on the required power and a second distribution strategy when the required power is less than or equal to the total discharge power;
the control module is further configured to control each dischargeable battery to discharge externally according to a respective second discharge power;
the comparison module is further configured to determine whether a total discharge time period reaches the demand time period;
the control module is further configured to control each dischargeable battery to end discharging when the discharge time period reaches the demand time period.
In a preferred embodiment of the control system of the charging and replacing power station, the control system further includes:
the calculation module is further configured to calculate a maximum total output power of all dischargeable batteries within the charging station; calculating a sustainable discharge power based on the maximum total output power;
the sending module is further configured to report a sustainable discharge power;
wherein the sustainable discharge power is less than the maximum total output power.
In a preferred technical solution of the control system of the charging and replacing station, the control module is further configured to increase the first discharge power of all other dischargeable batteries when one dischargeable battery is discharged from the current state of charge to the discharge cutoff state of charge;
the control module is further configured to control the battery replacement unit to replace a battery on a vehicle with the battery discharged to the discharge cut-off state of charge.
The present proposal also provides a computer readable storage medium storing a plurality of program codes, the program codes being adapted to be loaded and run by a processor to execute the control method of the charging and replacing power station according to any of the above preferred technical solutions.
This proposal also provides a control device, including:
a processor;
a memory adapted to store a plurality of program codes, the program codes adapted to be loaded and run by the processor to perform the control method of the charging and swapping station of any of the above preferred embodiments.
The proposal also provides a charging and replacing station which comprises the control device.
When the required electric energy is larger than the total discharge electric energy, the reverse battery replacement requirement information is sent outwards, so that a vehicle responding to the information can reversely replace the battery to the battery charging and replacing station.
When the dischargeable battery is controlled to discharge outwards with the first discharge power, the dischargeable battery is sequentially discharged to a discharge cut-off state of charge for equal preset interval duration, and the ordered discharge of the dischargeable battery is realized while the power consumption requirement is met. And the preset interval duration is longer than the setting mode of the duration required by reverse battery replacement of the vehicle, so that the interval time from the discharge to the discharge cut-off state of charge of two adjacent dischargeable batteries is shorter when the battery replacement of the vehicle is carried out, the battery can be replaced by the reverse battery replacement in time when one dischargeable battery is discharged to the discharge cut-off state of charge, the total output power of the dischargeable battery is ensured to meet the requirement, the output is stable, and the external continuous discharge is realized.
The required battery replacement time is determined based on the fastest discharge time and the preset interval duration, the battery replacement is carried out reversely, and the first discharge power of each dischargeable battery is managed, so that the vehicle capable of reversely replacing the battery can orderly carry out reverse battery replacement, and meanwhile, each dischargeable battery can also orderly discharge, the stability of continuous discharge is ensured, and the discharge interruption is avoided.
By calculating the first estimated arrival time of the vehicle, determining the recommended battery replacement time based on the first estimated arrival time and giving a response suggestion, the sequential progress of reverse battery replacement can be guaranteed to the greatest extent, and discharge power fluctuation and discharge interruption caused by instability of the arrival time of the vehicle are avoided.
By determining the second estimated arrival time of the vehicle and adjusting the first discharge power of each dischargeable battery based on the second estimated arrival time, it can be ensured that the total discharge output power of all the dischargeable batteries is kept stable before the vehicle arrives at the charging station, and forced interruption of discharge due to insufficient discharge power caused by excessive dischargeable batteries discharging to a discharge cut-off state of charge before the vehicle arrives is avoided.
The first discharge power of each dischargeable battery is adjusted only when the second estimated station time is later than the fastest discharge time, so that the overall discharge stability can be ensured, and frequent fluctuation of power is avoided.
By adjusting the required battery replacement time based on the second estimated arrival time, the dynamic adjustment of the vehicle scheduling scheme can be realized, and excessive scheduling or ineffective scheduling is avoided.
By calculating the maximum output total power of all dischargeable batteries and calculating and reporting the sustainable discharge power based on the maximum output total power, the service capability of the current charging and replacing station can be evaluated and reported, and the problem that the whole station cannot provide the sustainable discharge service due to overhigh required power is avoided.
When one dischargeable battery is discharged to a discharge cut-off state of charge, the first discharge power of all other dischargeable batteries is increased, so that the total output power can still be kept to meet the requirement in the battery replacement process, and continuous discharge is realized.
Scheme 1. a control method of a charging and replacing power station, which is characterized in that the charging and replacing power station comprises a battery replacing unit and a plurality of battery bins, the battery bins are used for charging and discharging batteries, the battery replacing unit is used for replacing batteries for vehicles, the battery bins are connected with a power utilization part through a bidirectional charging and discharging module,
the control method comprises the following steps:
acquiring discharge demand information, and determining demand electric energy based on the discharge demand information;
calculating total discharge electric energy which can be provided by all dischargeable batteries in the charging and replacing station;
comparing the required electric energy with the total discharge electric energy;
when the required electric energy is larger than the total discharge electric energy, reverse battery replacement requirement information is sent outwards so that a vehicle responding to the reverse battery replacement requirement information arrives at the battery charging and replacing station to perform reverse battery replacement;
determining a first discharge power of each dischargeable battery based on the discharge demand information and a first allocation strategy;
and controlling each dischargeable battery to discharge outwards according to the respective first discharge power.
Scheme 2. the method for controlling a charging and switching station according to scheme 1, wherein the first allocation policy is:
when all the dischargeable batteries are discharged externally with respective first discharge power, the batteries can be discharged from the current charge state to a discharge cut-off charge state sequentially according to equal preset interval duration;
and the preset interval duration is longer than the duration required by reverse battery replacement of the vehicle.
Scheme 3. the control method of a charging and replacing power station according to scheme 2, characterized in that the control method further comprises:
calculating an electric energy gap according to the required electric energy and the total discharge electric energy;
calculating the fastest discharge time of all dischargeable batteries from the current charge state to the discharge cut-off charge state at respective first discharge power;
calculating the required number of vehicles needing reverse battery replacement and the required battery replacement time of each vehicle needing to arrive based on the electric energy notch and the fastest discharge time;
the step of sending the reverse battery replacement requirement information outwards further comprises the following steps:
and sending the required quantity and the required battery replacement time outwards.
Scheme 4. the control method for a battery charging and replacing station according to scheme 3, wherein the required battery replacing time is determined based on the fastest discharge time and the preset interval duration.
Scheme 5. the control method of a charging and replacing power station according to scheme 3, characterized in that the control method further comprises:
acquiring state parameters of a vehicle, and calculating first estimated arrival time of the vehicle based on the state parameters;
determining suggested power change time based on the first estimated arrival time and the required power change time;
and sending out a response suggestion based on the suggested battery replacement time.
Scheme 6. the control method of a charging and replacing power station according to any one of schemes 1 to 5, characterized in that the control method further comprises:
acquiring demand response information, and determining second estimated arrival time of the next arrival vehicle;
adjusting a first discharge power of each dischargeable battery based on the second estimated arrival time.
Scheme 7. the control method for a charging and discharging power station according to scheme 6 referring to scheme 3 or 4, wherein the step of "adjusting the first discharging power of each dischargeable battery based on the second estimated arrival time" further includes:
judging whether the second estimated arrival time is later than the fastest discharge time;
if so, adjusting the first discharge power of each dischargeable battery based on the second estimated arrival time.
Scheme 8. the method for controlling a charging and replacing power station according to scheme 7, wherein the step of adjusting the first discharging power of each dischargeable battery based on the second estimated arrival time further comprises:
adjusting the first discharge power by the following formula:
P1_i＝(SOC_i-SOC_end)×Qrated_i/[T1+(i-1)ΔT-Tn]
wherein, P1 — i is the first discharge power of the ith dischargeable battery; SOC _ i is the current state of charge of the ith dischargeable battery; SOC _ end is the discharge cut-off state of charge of the dischargeable battery; qrated _ i is the rated capacity of the i-th dischargeable battery; t1 is the second estimated arrival time; tn is the current time; delta T is a preset interval duration; n, n is the number of dischargeable cells.
Scheme 9. the control method for a charging and discharging power station according to scheme 7, wherein after the step of "adjusting the first discharge power of each dischargeable battery", the control method further comprises:
adjusting the required battery replacement time based on the second estimated arrival time; and/or
Estimating a remaining capacity of the vehicle when the vehicle reaches the charging and replacing station, and adjusting the required quantity based on the remaining capacity.
Scheme 10. the method for controlling a charging and replacing power station according to scheme 1, wherein the discharge demand information includes a demand power and a demand duration, and the method further includes:
when the required electric energy is less than or equal to the total discharge electric energy, determining a second discharge power of each dischargeable battery based on the required power and a second distribution strategy;
controlling each dischargeable battery to discharge externally according to respective second discharge power;
judging whether the total discharge time reaches the required time;
and when the discharge time reaches the required time, controlling each dischargeable battery to finish discharging.
Scheme 11. the control method for a charging and replacing power station according to scheme 1, further comprising:
calculating the maximum output total power of all dischargeable batteries in the charging and replacing power station;
calculating a sustainable discharge power based on the maximum total output power;
reporting the sustainable discharge power;
wherein the sustainable discharge power is less than the maximum total output power.
Scheme 12. the control method for a charging and replacing power station according to scheme 1, further comprising:
when one dischargeable battery is discharged from the current charge state to the discharge cut-off charge state, the first discharge power of all other dischargeable batteries is increased;
and controlling the battery replacement unit to replace the battery on the vehicle with the battery discharged to the discharge cut-off state of charge.
Scheme 13. a control system of a charging and replacing power station, characterized in that the charging and replacing power station comprises a battery replacing unit and a plurality of battery compartments, the battery compartments are used for charging and discharging batteries, the battery replacing unit is used for replacing batteries for vehicles, the battery compartments are connected with a power utilization part through a bidirectional charging and discharging module,
the control system includes:
an acquisition module configured to acquire discharge demand information;
a determination module configured to determine a required electric energy based on the discharge demand information;
a calculation module configured to calculate a total discharge electrical energy that all dischargeable batteries within the charging and replacing station are capable of providing;
a comparison module configured to compare the required electrical energy with the total discharge electrical energy;
a sending module configured to send reverse battery replacement demand information outwards when the required electric energy is greater than the total discharge electric energy, so that a vehicle responding to the reverse battery replacement demand information enters the battery charging and replacing station for reverse battery replacement;
the determination module is further configured to determine a first discharge power of each dischargeable battery based on the discharge demand information and a first allocation policy;
a control module configured to control each dischargeable battery to discharge outward at a respective first discharge power.
Scheme 14. the control system for a charging and switching station according to scheme 13, wherein the first allocation policy is:
when all the dischargeable batteries are discharged externally with respective first discharge power, the batteries can be discharged from the current charge state to a discharge cut-off charge state sequentially according to equal preset interval duration;
and the preset interval duration is longer than the duration required by reverse battery replacement of the vehicle.
Scheme 15. the control system for a charging and replacing power station according to scheme 14, wherein,
the calculation module is further configured to calculate an electric energy gap according to the required electric energy and the total discharge electric energy, calculate a fastest discharge time for all dischargeable batteries to be discharged from a current state of charge to a discharge cutoff state of charge at respective first discharge powers; calculating the required number of vehicles needing reverse battery replacement and the required battery replacement time required by each vehicle to arrive based on the electric energy notch and the fastest discharge time;
the sending module is further configured to send the required quantity and the required battery replacement time outwards.
Scheme 16. the control system for a battery charging and replacing station according to scheme 15, wherein the required battery replacing time is determined based on the fastest discharge time and the preset interval duration.
Scheme 17. the control system for a charging and replacing power station according to claim 15, wherein,
the acquisition module is further configured to acquire a state parameter of a vehicle;
the calculation module is further configured to calculate a first estimated arrival time of the vehicle based on the state parameter;
the determination module is further configured to determine a suggested power change time based on the first estimated arrival time and the required power change time;
the sending module is further configured to send out a response suggestion based on the suggested battery swapping time.
Scheme 18. the control system for a charging and replacing power station according to any one of schemes 13 to 17,
the obtaining module is further configured to obtain demand response information;
the determination module is further configured to determine a second estimated arrival time of a next arriving vehicle;
the control module is further configured to adjust a first discharge power of each dischargeable battery based on the second estimated arrival time.
The control system for a charging and replacing power station according to claim 18 referring to claim 15 or 16, wherein the control module is further configured to adjust the first discharge power of each dischargeable battery based on the second estimated arrival time by:
judging whether the estimated arrival time is later than the fastest discharge time;
if so, adjusting the first discharge power of each dischargeable battery based on the second estimated arrival time.
Solution 20. the control system for a charging and replacing station according to solution 19, wherein the control module is further configured to adjust the first discharge power of each dischargeable battery based on the second estimated arrival time by:
adjusting the first discharge power by the following formula:
P1_i＝(SOC_i-SOC_end)×Qrated_i/[T1+(i-1)ΔT-Tn]
wherein, P1 — i is the first discharge power of the ith dischargeable battery; SOC _ i is the current state of charge of the ith dischargeable battery; SOC _ end is the discharge cutoff state of charge of the dischargeable battery; qrated _ i is the rated capacity of the i-th dischargeable battery; t1 is the second estimated arrival time; tn is the current time; delta T is a preset interval duration; n, n is the number of dischargeable cells.
Scheme 21. the control system for a charging and replacing power station according to scheme 19, wherein,
the control module is further configured to adjust the demand battery replacement time based on the second estimated arrival time; and/or
The calculation module is further configured to estimate a remaining capacity of the vehicle when the vehicle reaches the charging station, and the control module is further configured to adjust the required amount based on the remaining capacity.
Scheme 22. the control system for a charging and replacing power station according to scheme 13, wherein the discharging requirement information includes required power and required duration,
the determination module is further configured to determine a second discharge power of each dischargeable battery based on the required power and a second distribution strategy when the required power is less than or equal to the total discharge power;
the control module is further configured to control each dischargeable battery to discharge externally according to a respective second discharge power;
the comparison module is further configured to determine whether a total discharge time period reaches the demand time period;
the control module is further configured to control each dischargeable battery to end discharging when the discharge time period reaches the demand time period.
Scheme 23. the control system for a charging and replacing power station according to claim 13, further comprising:
the calculation module is further configured to calculate a maximum total output power of all dischargeable batteries within the charging station; calculating sustainable discharge power based on the maximum total output power;
the sending module is further configured to report a sustainable discharge power;
wherein the sustainable discharge power is less than the maximum total output power.
Scheme 24. the control system for a charging and replacing power station according to scheme 13, characterized in that,
the control module is further configured to increase the first discharge power of all other dischargeable batteries when one dischargeable battery is discharged from a current state of charge to a discharge cutoff state of charge;
the control module is further configured to control the battery replacement unit to replace a battery on a vehicle with the battery discharged to the discharge cut-off state of charge.
Scheme 25. a computer readable storage medium storing a plurality of program codes, wherein the program codes are adapted to be loaded and executed by a processor to execute the control method of a charging station according to any of schemes 1 to 12.
A control apparatus according to claim 26, comprising:
a processor;
a memory adapted to store a plurality of program codes adapted to be loaded and run by the processor to perform the control method of a charging station of any of schemes 1 to 12.
Scheme 27. A charging and replacing power station is characterized by comprising the control device in the scheme 26.
Drawings
The control method, system, medium, device and charging and swapping station of the present application are described below with reference to the accompanying drawings and in conjunction with the charging and swapping station discharging to the power grid. In the drawings:
fig. 1 is a system diagram of a charging and swapping station according to the present application;
fig. 2 is a flowchart of a control method of the charging and swapping station according to the present application;
fig. 3 is a logic diagram of a possible embodiment of a control method of a charging and swapping station according to the present application;
fig. 4 is a system block diagram of a control system of the charging and swapping station of the present application.
List of reference numerals
1. A battery replacement platform; 2. a battery compartment; 21. a charge and discharge control panel; 22. a bidirectional AC/DC module; 3. a main control unit; 4. a cloud server; 5. a battery;
100. a control system of the charging and replacing station; 110. an acquisition module; 120. a determination module; 130. a calculation module; 140. a comparison module; 150. a sending module; 160. and a control module.
Detailed Description
Preferred embodiments of the present application are described below with reference to the accompanying drawings. It should be understood by those skilled in the art that these embodiments are only for explaining the technical principles of the present application, and are not intended to limit the scope of protection of the present application. For example, although the present embodiment is described in connection with discharging the charging and replacing power station to the power grid, this is not intended to limit the scope of the present application, and those skilled in the art may apply the present application to other application scenarios without departing from the principles of the present application. For example, the technical solution of the present application may also be applied to discharging the charging and replacing power station to other devices and power facilities. The charging and replacing power station can provide power facilities for charging and discharging batteries and replacing batteries, can be a charging and replacing integrated power station, a small-sized replacing power station and the like for replacing the batteries of the electric automobile, and can also be an energy storage station and the like with a replacing function.
It should be noted that the terms "first" and "second" in the description of the present application are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.
It should also be noted that, in the description of the present application, unless explicitly stated or limited otherwise, the term "connected" is to be understood broadly, for example, it may be a fixed connection, a detachable connection, or an integral connection; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present application can be understood by those skilled in the art as the case may be.
Referring first to fig. 1, a charging and replacing power station of the present application is described. Fig. 1 is a system diagram of a charging and replacing power station of the present application, in which a solid line represents a circuit and a dot-dash line represents a communication line.
As shown in fig. 1, the charging and replacing power station of the present application includes a main control unit 3, a power replacing unit (not shown in the figure) and a plurality of battery compartments 2, the power replacing unit is used for replacing a battery 5 for a vehicle, the battery compartments 2 are used for charging and discharging the battery 5, and the battery compartments 2 are connected to a power utilization portion through a bidirectional charging and discharging module. The main control unit 3 is simultaneously in communication connection with the battery bin 2 and the battery replacement unit so as to control the charging and discharging of the battery bin 2 and the battery replacement of the battery replacement unit.
Specifically, battery compartment 2 is provided with a plurality ofly, and a battery 5 can be deposited to every battery compartment 2, is provided with the charge-discharge branch road in the battery compartment 2, and every charge-discharge branch road controls the charge-discharge of a battery 5. Each charging and discharging branch comprises a charging and discharging control board 21, a bidirectional charging and discharging module and other necessary electrical components, such as wires, signal lines, circuit breakers and the like. The bidirectional charge-discharge module is a bidirectional AC/DC module 22 in the present application, the power consumption unit is a power grid, and the battery 5 is connected to the power grid through the bidirectional AC/DC module 22. The charging and discharging control board 21 is connected to the bi-directional AC/DC module 22, the battery 5, etc. at the same time, and is used to communicate with the bi-directional AC/DC module 22 and the battery 5 (such as the BMS of the battery 5) to achieve the acquisition of the state parameters of the battery 5 and the control of the charging and discharging processes. The State parameters of the battery 5 include, but are not limited to, charging power, discharging power, current, voltage, temperature of the battery 5, State of Charge (SOC), and the like. Although the bidirectional charge and discharge module is exemplified as the AC/DC module 22 in the present application, in other embodiments, the bidirectional charge and discharge module may be adjusted based on the type of the power consuming part and the battery 5.
The battery replacing unit comprises a battery replacing platform 1 and a related battery replacing device, the battery replacing device comprises a lifting machine, a battery replacing robot and the like, when a vehicle is parked on the battery replacing platform 1, a battery on the vehicle can be transferred to the battery bin 2 by the battery replacing device, and the battery 5 in the battery bin 2 is replaced to the vehicle.
The main control unit 3 performs communication interaction with the charge and discharge control panels 21 of each charge and discharge branch through a communication bus to send a control instruction to the charge and discharge control panels 21 to control the charge and discharge operations of each charge and discharge branch. The main control unit 3 is also in communication interaction with the battery swapping unit through a communication bus, and is used for sending a battery swapping instruction to the battery swapping unit and coordinating the battery swapping unit to swap batteries.
Further, the main control unit 3 is also in communication connection with the cloud server 4, so as to realize communication interaction with the cloud server 4. In this application, high in the clouds server 4 can with vehicle communication connection to the realization is with the information transmission in the high in the clouds of main control unit 3 upload for the vehicle, and returns the feedback information of vehicle for main control unit 3 etc..
Under normal conditions, the working process of the charging and replacing station is as follows: vehicle battery replacement → electric power shortage battery transfer to charging bin → electric power shortage battery charging → battery full charge stop charging → vehicle battery replacement.
When the power grid needs to be discharged, the cloud server 4 receives the discharge demand information and sends the discharge demand information to the main control unit 3, manual operation can be performed on a touch screen of the main control unit 3 at the moment, a discharge instruction can be sent to the main control unit 3 from the cloud server 4 to achieve automatic operation, the main control unit 3 further sends a discharge starting and discharging power instruction to the whole system to achieve external discharge, and the main control unit 3 can also send a discharge starting and discharging power instruction to one or more charge and discharge branches independently.
After receiving the instruction of the main control unit 3, the charge and discharge control board 21 controls the bidirectional AC/DC module 22 to perform the discharge operation of the battery 5, and monitors the running states of the battery 5, the bidirectional AC/DC module 22 and the branch circuit in real time. As described in the background art, in the prior art, there is a charging and replacing power station that discharges to a power grid, but at present, the main problem is that the charging and replacing power station has a limited discharge capacity, and cannot meet the power demand of the power grid. When the electric quantity of the battery 5 in the charging and replacing station is insufficient, the main control unit 3 sends the reverse charging demand information to the cloud server 4, the reverse charging scheduling information is sent to nearby vehicles through the cloud server 4, the vehicles with high residual electric quantity nearby are scheduled to carry out reverse charging on the charging and replacing station, the high-SOC battery on the vehicle is replaced into the battery compartment 2, the low-SOC battery 5 in the battery compartment 2 is replaced on the vehicle, and the continuous external discharging function of the charging and replacing station is achieved.
It should be noted that, although a specific arrangement of the charging and replacing power station is described in the foregoing embodiment, this is not intended to limit the scope of the present application. Without departing from the principle of the present application, a person skilled in the art may adjust the specific form of the charging and swapping station, so that the control method described below in the present application can be applied to more application scenarios.
For example, in an alternative embodiment, the cloud server 4 may be omitted, and a communication module is provided in the main control unit 3 to communicate with nearby vehicles, and the main control unit 3 is directly connected to the power grid to obtain the discharge demand information.
Referring to fig. 2, a control method of the charging and replacing power station of the present application will be described. Fig. 2 is a flowchart of a control method of a charging and swapping station according to the present application.
As shown in fig. 2, in order to solve the problem that the operation of the whole station is blocked when the master control system fails in the power management method of the conventional charging and swapping station, the control method of the charging and swapping station of the application includes:
s101, acquiring the discharging demand information, and determining the demand electric energy based on the discharging demand information. For example, the discharging demand information includes demand power and demand duration, and the cloud server sends the discharging demand information to the main control unit after receiving the discharging demand information. The main control unit acquires the discharge demand information, analyzes the discharge demand information to obtain demand power and demand duration, and then calculates demand electric energy based on the demand power and the demand duration, namely calculates the product of the demand power and the demand duration to obtain the demand electric energy.
Certainly, the required electric energy can also be obtained by analyzing and calculating the discharging demand information by the cloud server, and then the required electric energy, the required power and the required duration are sent to the main control unit as the discharging demand information together, and the main control unit directly extracts the required electric energy from the discharging demand information. In short, the specific determination mode of the required electric energy is not limited, and any mode capable of determining the required electric energy can be applied to the application.
And S103, calculating the total discharge electric energy which can be provided by all dischargeable batteries in the charging and replacing power station. For example, the total discharge electric energy may be calculated based on the dischargeable electric quantity of each dischargeable battery, such as adding the dischargeable electric quantities of all the dischargeable batteries.
The dischargeable battery refers to a battery with a current state of charge (hereinafter referred to as current SOC) greater than a certain percentage in the present application, and for example, the dischargeable battery may be a battery with a current SOC greater than or equal to 15%. Of these, 15% is also referred to as a discharge cut-off state of charge (hereinafter, referred to as a discharge cut-off SOC), and although 15% is taken as an example in this application, the specific value is not exclusive, and those skilled in the art can adjust the value based on the specific application scenario.
In the present application, the specific setting value of the discharge cut-off state of charge is mainly based on that the remaining capacity of the battery can support the vehicle after reverse battery replacement to travel a specific distance (e.g. 50-100km), so as to avoid that the vehicle after reverse battery replacement cannot normally travel due to insufficient remaining capacity of the battery.
And S105, comparing the required electric energy with the total discharge electric energy. For example, after the required electric energy and the total discharge electric energy are obtained, the difference value or the ratio of the required electric energy and the total discharge electric energy are calculated to compare the required electric energy and the total discharge electric energy, so as to determine whether the total discharge electric energy of the current charging and converting station is sufficient to meet the requirement of the power grid.
And S107, when the required electric energy is larger than the total discharge electric energy, sending reverse battery replacement requirement information outwards so as to enable the vehicle responding to the reverse battery replacement requirement information to reach a battery charging and replacing station for reverse battery replacement. For example, when the required electric energy is greater than the total discharge electric energy, it is proved that the total electric quantity which can be discharged to the power grid by the current charging and replacing station is not enough to meet the requirement of the power grid, or the electric quantity which can be discharged to the power grid by the current charging and replacing station can only be discharged according to the required power and operated for a period of time, and the required time cannot be reached. At this moment, the main control unit sends the reverse battery replacement requirement information to the cloud server, so that the cloud server issues the reverse battery replacement requirement information to the vehicles near the battery charging and replacing station, and the vehicles responding to the reverse battery replacement requirement information can carry out reverse battery replacement to the battery charging and replacing station.
In this application, reverse trade electric power indicates to change the high SOC battery on the vehicle to the battery compartment in, with the low SOC battery in the battery compartment change the vehicle on to realize filling the increase of trading power station total discharge electric energy, when total discharge electric energy increases to the demand electric quantity that is greater than or equal to the electric wire netting, alright satisfy the electric wire netting demand of discharging.
And S109, determining first discharging power of each dischargeable battery based on the discharging requirement information and the first distribution strategy. For example, when the total discharge electric energy is smaller than the required electric energy, the required power of the power grid is preferentially met, the charging and battery replacing station is controlled to discharge to the power grid by taking the required power as the total output power, and a vehicle is waited to arrive at the charging and battery replacing station to perform reverse battery replacement in the discharging process. Thus, based on the demanded power in the discharge demand information and the first allocation strategy, the first discharge power of each dischargeable battery is determined such that the sum of the first discharge powers is equal to the demanded power. The first allocation strategy may be an average allocation, a proportional allocation, or other allocation manner, and the following embodiments of the present application will describe a more preferable allocation manner.
And S111, controlling each dischargeable battery to discharge outwards according to the respective first discharge power. For example, after the first discharge power of each dischargeable battery is determined, all the dischargeable batteries are controlled to start to operate according to the respective first discharge power, so that the total output power of the charging and replacing power station is equal to the required power of the power grid.
By means of the control method, the high-SOC battery on the vehicle and the low-SOC battery in the charging and replacing station can be reversely replaced by using the charging function of the charging and replacing station on the basis of achieving external discharging of the charging and replacing station, external continuous discharging of the charging and replacing station is achieved, and the power utilization requirement of a power utilization part is fully met.
The following describes a preferred embodiment of the present application.
In one embodiment, the total discharge power can be calculated by the following equation (1):
Qa＝∑(SOC_i-SOC_end)×Qrated_i×η (1)
in the formula (1), Qa is the total discharge power; SOC _ i is the current state of charge of the ith dischargeable battery; SOC _ end is the discharge cutoff state of charge of the dischargeable battery; qrated _ i is the rated capacity of the i-th dischargeable battery; eta is the discharge efficiency; n, n is the number of dischargeable cells.
Through the formula (1), the dischargeable electric energy of each dischargeable battery can be accurately obtained, and then the dischargeable electric energy of each dischargeable battery is added to obtain the total dischargeable electric energy of the charging and replacing station.
In one embodiment, the first allocation policy is: when all the dischargeable batteries are discharged externally with respective first discharge power, the batteries can be discharged to a discharge cut-off state of charge from the current state of charge sequentially according to the same preset interval duration.
Specifically, in addition to making the sum of the first discharge powers of all the dischargeable batteries equal to the required power, the present application further defines the discharge power distribution of each dischargeable battery so that the dischargeable batteries can be discharged in order. In the application, all dischargeable batteries can be arranged from small to large according to the remaining SOC, then the arranged dischargeable batteries are discharged to the discharging cut-off SOC from the current SOC at the same time, and after the first dischargeable battery discharges to the discharging cut-off SOC, the next dischargeable battery discharges to the discharging cut-off SOC at intervals of preset interval duration, so that the first discharging power of each battery is determined. For example, if the number of the dischargeable batteries is n, the time from the discharging of the first battery to the discharging cut-off SOC is T0 (or called the fastest discharging time), and the preset interval duration is Δ T, then the discharging time of the remaining dischargeable batteries to the discharging cut-off SOC sequentially: t0+ Δ T, T0+2 Δ T, T0+3 Δ T, T0+ (n-1) Δ T. The determination of T0 will be described in detail below.
In other words, the first discharge power needs to satisfy both the following formula (2) and formula (3):
∑P1_i×η＝Preq (2)
P1_i＝(SOC_i-SOC_end)×Qrated_i/[T0+(i-1)ΔT-Tn] (3)
in the formula (2) and the formula (3), P1 — i is the first discharge power of the ith battery; eta is the discharge efficiency; preq is the required power; the SOC _ i is the current state of charge of the ith dischargeable battery; SOC _ end is the discharge cutoff state of charge of the dischargeable battery; qrated _ i is the rated capacity of the i-th dischargeable battery; t0 is the fastest discharge time; delta T is a preset interval duration; tn is the current time; n, n is the number of dischargeable cells.
Preferably, the preset interval duration is determined based on the reverse battery replacement time, and the preset interval duration is longer than the duration required by the reverse battery replacement of the vehicle. For example, if the vehicle starts to swap batteries and ends swapping the batteries, specifically, the time from the vehicle starts to enter the battery swapping platform to the time from the time when the battery swapping is completed to exit the battery swapping platform is 4 to 7min, the preset interval time may be 8 to 12 min.
In this way, taking the two batteries as an example, one complete reverse battery replacement can be realized within the interval duration (i.e., the preset interval duration) from the time when the first battery discharges to the discharge cutoff SOC to the time when the second battery discharges to the discharge cutoff SOC, that is, when the first battery discharges to the discharge cutoff SOC, the battery replacement unit exchanges the first battery with the battery on the vehicle, and then the second battery does not discharge to the discharge cutoff SOC. The replacement process of other batteries is similar to that of the battery replacement process, and is not described in detail.
When the dischargeable battery is controlled to discharge outwards with the first discharge power, the batteries are discharged to the discharge cut-off state of charge in sequence with the same preset interval duration, and the control method can meet the power consumption requirement and simultaneously realize the ordered discharge of the dischargeable battery. And the preset interval duration is longer than the setting mode of the duration required by reverse battery replacement of the vehicle, so that the interval time from the discharge to the discharge cut-off state of charge of two adjacent dischargeable batteries is shorter when the battery replacement of the vehicle is carried out, the battery can be replaced by the reverse battery replacement in time when one dischargeable battery is discharged to the discharge cut-off state of charge, the total output power of the dischargeable battery is ensured to meet the requirement, the output is stable, and the external continuous discharge is realized.
It should be noted that, although the first discharging power of each battery is determined according to the arrangement of the dischargeable batteries from small to large in the foregoing embodiment, this is not a limitation, and in other embodiments, a person skilled in the art may arbitrarily select the arrangement order of all the dischargeable batteries as long as the finally determined first discharging power satisfies the first allocation strategy.
In one embodiment, the control method further comprises: calculating an electric energy gap according to the required electric energy and the total discharge electric energy; calculating the fastest discharge time of all dischargeable batteries from the current charge state to the discharge cut-off charge state at respective first discharge power; and calculating the required number of the vehicles needing reverse battery replacement and the required battery replacement time of each vehicle needing to arrive based on the electric energy gap and the fastest discharge time.
Specifically, before the information of the reverse battery replacement requirement is sent out, the electric energy gap can be calculated based on the current data, and then the quantity of the vehicles needing to be subjected to reverse battery replacement and the battery replacement time of the vehicles needing to arrive are determined, so that the issuing accuracy and timeliness of the reverse battery replacement requirement are improved.
Wherein, the electric energy gap can be calculated based on the required electric energy and the total discharge electric energy, for example, the electric energy gap can be calculated based on the following formula (4):
Qdiff＝(Qreq-Qa)/η (4)
in the formula (4), Qdiff is an electric energy gap; qreq is the required power; qa is total discharge power; η is the discharge efficiency.
After the electric energy gap is calculated, the required number of the vehicles needing to be reversely charged can be further calculated. For example, the demand amount may be determined based on the following equation (5):
M＝Qdiff/(E×a) (5)
in the formula (5), M is the required number; qdiff is the power gap; e is the rated capacity of the battery; a is the coefficient of electric quantity, and a is less than 1. Wherein, E can be determined by the rated capacity of a single battery, or by the average value or weighted value of a plurality of batteries with different specifications. a may be determined empirically or experimentally, and the larger the value of a, the fewer the number of vehicles that need to be dispatched, but the fewer vehicles that are calculated to meet the dispatching criteria (i.e., the amount of remaining power at arrival is greater than E × a).
The fastest discharge time T0 can be determined in various ways in the present application, specifically as follows:
in a preferred embodiment, the fastest discharge time T0 can be calculated by a forward calculation method. For example, when the above equations (2) and (3) are employed to determine the first discharge power, the following equation (6) may be established by means of the link between the two equations:
∑(SOC_i-SOC_end)×Qrated_i/[T0+(i-1)ΔT-Tn]×η＝Preq (6)
in equation (6), except T0, the other parameters such as the current state of charge SOC _ i, the discharge cutoff state of charge SOC _ end, the rated capacity Qrated _ i of each dischargeable battery, the preset interval duration Δ T, the current time Tn, the discharge efficiency η, and the required power Preq are known quantities, so the value of T0 can be obtained, and T0 is the fastest discharge time.
In an alternative embodiment, the fastest discharge time T0 may be calculated by a reverse calculation method. For example, after the reverse battery replacement request is sent out, when there is a vehicle response request, the arrival time of all responding vehicles can be estimated based on parameters such as the positions of the vehicles, the current road conditions and the like, and the earliest arrival time of the arrival times of all responding vehicles is taken as the fastest discharge time T0. However, this embodiment has a certain probability that the calculated sum of the first discharge powers of all the dischargeable batteries is not equal to the required power, and therefore, the second trimming needs to be performed for each first discharge power so that the sum of the first discharge powers of all the dischargeable batteries is equal to the required power.
In other embodiments, one skilled in the art may also determine the fastest discharge time T0 in other ways. For example, the first discharge power of each dischargeable battery may be determined based on average distribution or proportional distribution, and then the discharge time of each battery may be calculated based on the ratio of the remaining capacity of each dischargeable battery to the first discharge power, and the shortest discharge time among all the discharge times may be used as the fastest discharge time T0. For another example, a dischargeable battery may be determined (e.g., a dischargeable battery with the minimum current SOC is randomly determined or selected), then the dischargeable battery is discharged with a preset power, the discharge time of the dischargeable battery is calculated as the fastest discharge time T0, and the discharge times of other dischargeable batteries are increased by a corresponding number of preset interval durations Δ T on the basis of the fastest discharge time T0.
After the fastest discharge time is calculated, the required battery replacement time is preferably determined based on the fastest discharge time and a preset interval duration. For example, according to the first allocation strategy, the dischargeable batteries in the charging station are sequentially discharged to the discharging cut-off SOC at times T0, T0+ Δ T, T0+2 Δ T, T0+3 Δ T,.... farads, T0+ (n-1) Δ T, respectively, so that the vehicle needs to be dispatched to the charging station for reverse charging before the times to ensure that each dischargeable battery is discharged to the discharging cut-off SOC, and then reverse charging can be immediately performed. Therefore, the required battery replacement time needs to be before the fastest discharge time T0 or between the discharge of two adjacent dischargeable batteries to the discharge cut-off SOC, namely the required battery replacement time needs to be before T0, between T0 and T0+ Δ T, between T0+ Δ T and T0+2 Δ T, between T0+ (n-2) Δ T and T0+ (n-1) Δ T.
After the required quantity and the required battery replacement time are determined, the step of sending the reverse battery replacement required information outwards further comprises the following steps: and sending the required quantity and the required battery replacement time outwards. Therefore, the cloud server sends the reverse battery replacement requirement information to the vehicles near the battery replacement station, and the residual electric quantity when the vehicles arrive at the battery replacement station is larger than the residual electric quantity (E multiplied by a).
By calculating the required quantity and the required battery replacement time based on the electric energy gap, the issuing accuracy and timeliness of the reverse battery replacement requirement can be improved, and the sequential discharge of the battery charging and replacing station is facilitated. The required battery replacement time is determined based on the fastest discharge time and the preset interval duration, the battery replacement is carried out reversely, and the first discharge power of each dischargeable battery is managed, so that the vehicle capable of reversely replacing the battery can orderly perform reverse battery replacement, and meanwhile, each dischargeable battery can also orderly perform discharge, the stability of continuous discharge is ensured, and the discharge interruption is avoided.
In one embodiment, the control method further comprises: acquiring state parameters of the vehicle, and calculating first estimated arrival time of the vehicle based on the state parameters; determining suggested power changing time based on the first estimated arrival time and the required power changing time; and sending out a response suggestion based on the suggested battery replacement time.
Specifically, when the vehicle responds to the reverse battery replacement demand information, a specific response suggestion can be given further based on the first estimated arrival time of the vehicle at the battery charging and replacing station. The state parameters of the vehicle comprise a geographical position, a vehicle speed and the like, when the vehicle responds to the reverse battery replacement demand information, the vehicle uploads the state parameters of the vehicle, and the time of the vehicle reaching the battery replacement station, namely the first estimated station arrival time, can be estimated by acquiring the state parameters of the vehicle and adding current road condition information and the like. And determining the arrival time of relative insurance according to the estimated first estimated arrival time and the determined required power change time, and sending a response suggestion to the vehicle. For example, if the current time is 15:00, the first estimated arrival time of the vehicle is estimated to be 15:20 according to the position and road condition information of the vehicle, and the required battery replacement time determined through the calculation includes 15:20, 15:30 and 15:40, in this case, it may be determined that the vehicle is suitable for responding to the required battery replacement time of 15:30, and a response suggestion of "suggesting to select the battery replacement time of 15: 30" is sent outwards, and the response suggestion is sent to the vehicle responding to the reverse battery replacement requirement through the cloud server. If the owner agrees to the suggestion, the vehicle sends the final response result to the cloud server, and then the cloud server returns the response result to the main control unit.
By calculating the first estimated arrival time of the vehicle, determining the recommended battery replacement time based on the first estimated arrival time and giving a response suggestion, the sequential progress of reverse battery replacement can be guaranteed to the greatest extent, and discharge power fluctuation and discharge interruption caused by instability of the arrival time of the vehicle are avoided.
Of course, the response suggestion may be given while the reverse battery replacement request is issued, and in this case, information such as a real-time position, a vehicle speed, and a road condition of the vehicle needs to be obtained in advance. Further, the skilled person can make adjustments to the above estimation without departing from the principles of the present application, as long as the first estimated arrival time of the vehicle can be estimated.
In one embodiment, the control method further comprises: acquiring demand response information, and determining second estimated arrival time of the next arrival vehicle; adjusting the first discharge power of each dischargeable battery based on the second estimated arrival time.
Specifically, due to factors such as road conditions and weather, even after the vehicle is responded according to the suggested battery replacement time, the vehicle may not arrive at the battery charging station on time, and if the vehicle fails to arrive on time or the number of vehicles responding to the battery reverse replacement requirement is not enough to support the requirement that each dischargeable battery discharges to the discharge cut-off SOC, the battery charging station may not discharge continuously due to insufficient total output power. Therefore, after the vehicle responds, the first discharge power of the dischargeable battery needs to be adjusted according to the estimated arrival time of the responding vehicle, so that the charging and replacing power station continuously discharges to the arrival of the reverse replacing vehicle at the required power.
Therefore, after the vehicle responds to the reverse battery replacement requirement information, the cloud server receives the condition that the vehicle responds to the reverse battery replacement requirement information and sends a response result to the main control unit. After receiving the demand response information, the main control unit determines second estimated arrival time of the next arrival vehicle based on the demand response information, wherein the demand response information may include the second estimated arrival time estimated by the cloud server, or may only include state parameter information of the vehicle, and the main control unit estimates the second estimated arrival time. The second estimated arrival time is calculated by referring to the first estimated arrival time, which is not described herein again. The step of determining the second estimated arrival time may be performed at intervals, or may be determined only once when the vehicle corresponds to the second estimated arrival time, or of course, the first estimated arrival time may be directly used as the second estimated arrival time.
After determining the second estimated station time, the step of adjusting the first discharge power of each dischargeable battery based on the second estimated station time further comprises: judging whether the second estimated arrival time is later than the fastest discharge time; if so, adjusting the first discharge power of each dischargeable battery based on the second estimated arrival time.
For example, when the second estimated arrival time is earlier than the fastest discharge time, it is proved that the next reverse battery replacement vehicle can arrive for battery replacement before the first dischargeable battery discharges to the discharge cutoff SOC, and at this time, the current first discharge power is continuously used for discharging without adjusting the first discharge power of each dischargeable battery. When the second estimated station time is later than the fastest discharge time, it is proved that the reverse battery replacement vehicle which arrives at the battery replacement station fastest next time can only arrive after the first dischargeable battery discharges to the discharge cut-off SOC, and at this time, if the reverse battery replacement vehicle continues to discharge outwards according to the current first discharge power, the situation that the total output power cannot meet the required power due to the fact that the plurality of dischargeable batteries discharge to the discharge cut-off SOC may occur continuously. The first discharge power of each dischargeable cell needs to be adjusted at this time to avoid this situation.
In one embodiment, the first discharge power may be adjusted by the following equation (7):
P1_i＝(SOC_i-SOC_end)×Qrated_i/[T1+(i-1)ΔT-Tn] (7)
in the formula (7), P1 — i is the first discharge power of the i-th adjusted dischargeable battery; SOC _ i is the current state of charge of the ith dischargeable battery; SOC _ end is the discharge cutoff state of charge of the dischargeable battery; qrated _ i is the rated capacity of the i-th dischargeable battery; t1 is the second estimated arrival time; delta T is a preset interval duration; tn is the current time; n, n is the number of dischargeable cells. Similarly, there is a certain probability that the calculated sum of the first discharge powers of all the dischargeable batteries is not equal to the required power, and therefore, the second trimming needs to be performed on each first discharge power so that the sum of the first discharge powers of all the dischargeable batteries is equal to the required power.
That is, the first discharge power of each dischargeable battery is readjusted by taking the second estimated station arrival time T1 as the fastest discharge time.
By determining the second estimated arrival time of the vehicle and adjusting the first discharge power of each dischargeable battery based on the second estimated arrival time, the total discharge output power of all dischargeable batteries can be ensured to be stable before the vehicle arrives at the charging station, and the phenomenon that the discharge is forced to be interrupted due to insufficient discharge power caused by the fact that too many dischargeable batteries are discharged to the discharge cut-off state of charge before the vehicle arrives is avoided. The first discharge power of each dischargeable battery is adjusted only when the second estimated station time is later than the fastest discharge time, so that the overall discharge stability can be ensured, and frequent fluctuation of power is avoided.
In one embodiment, after the step of adjusting the first discharge power of each dischargeable battery, the control method further includes: adjusting the required battery replacement time based on the second estimated arrival time; and/or estimating the remaining capacity of the vehicle when it arrives at the charging station, and adjusting the required amount based on the remaining capacity.
Specifically, after the first discharge power of the dischargeable battery is adjusted, the time for each dischargeable battery to discharge to the discharge cutoff SOC is correspondingly changed, and at this time, if a demand is issued according to the previous demand charging time, the vehicle arrival time in response to the demand is entirely advanced, which is not favorable for the ordered charging. At this time, the required battery replacement time may be readjusted and issued based on the redetermined time for each dischargeable battery to discharge to the discharge cutoff SOC. For example, when the second estimated station arrival time is T1, the required battery replacement time is issued from the time when the second battery is discharged to the discharge cutoff SOC and is between T1 and T1+ Δ T, between T1+ Δ T and T1+2 Δ T, between T1+ (n-2) Δ T and T1+ (n-1) Δ T.
Similarly, after the vehicle responds to the reverse battery replacement demand information, the residual electric quantity of the vehicle when the vehicle reaches the battery charging and replacing station is estimated, then the difference value between the electric energy gap and the residual electric quantity is calculated, and the demand quantity is recalculated based on the difference value, so that the demand is accurately issued and the scheduling is accurately realized.
By adjusting the required battery replacement time based on the second estimated arrival time and readjusting the required quantity based on the residual electric quantity when the vehicle arrives at the battery charging and replacement station, the dynamic adjustment of the vehicle scheduling scheme can be realized, and the over-scheduling or the invalid scheduling is avoided.
In one embodiment, the control method further comprises: when the required electric energy is less than or equal to the total discharge electric energy, determining a second discharge power of each dischargeable battery based on the required power and a second distribution strategy; controlling each dischargeable battery to discharge externally according to respective second discharge power; judging whether the total discharge time reaches the required time; and controlling each dischargeable battery to finish discharging when the discharging time reaches the required time.
Specifically, when the required electric energy is less than or equal to the total discharge electric energy, it is proved that the total discharge electric energy of the current dischargeable battery can meet the requirement of the power grid, or the electric quantity which can be discharged to the power grid by the current charging and converting station can be discharged according to the required power and operate for the required time. And then, controlling the dischargeable batteries to operate for the required time according to the respective second discharge power, and stopping discharging.
More preferably, the second preset allocation strategy is to allocate in proportion between the states of charge of each of the dischargeable batteries. In other words, the second discharge power is a product of a ratio of the current SOC of the dischargeable battery to the total SOC and the required power, that is, the required power is distributed to all the dischargeable batteries in a proportion between the current SOCs of the dischargeable batteries, and the distributed second discharge power satisfies the following formula (8):
∑P2_i×η_i＝Preq (8)
in equation (5), P2 — i is the second discharge power of the i-th dischargeable battery, η is the discharge efficiency, and Preq is the required power.
Of course, the proportional distribution is only a preferred embodiment, and in other embodiments, the second discharge power may be determined in an even distribution manner or the like.
In one embodiment, the control method further comprises: calculating the maximum output total power of all dischargeable batteries in the charging and replacing station; calculating sustainable discharge power based on the maximum total output power; reporting the sustainable discharge power; wherein the sustainable discharge power is less than the maximum total output power.
Specifically, for the charging station, the number of batteries that can be used as dischargeable batteries changes with the progress of operation, and for example, the number of batteries of the current charging station, the number of batteries whose current SOC is greater than the discharge cutoff SOC, and the like all affect the number of dischargeable batteries. And for each dischargeable cell, there is an upper limit to its maximum output power. The total discharge power which can be provided by the charging and replacing power station is in a change state due to the combination of the two factors. Furthermore, in order to provide a sustainable discharge service, it is determined that all the dischargeable batteries cannot be simultaneously discharged at the maximum output power, and if the discharge service is performed with the sum of the maximum output powers of all the dischargeable batteries as the total output power, the situation that the discharge cannot be continued occurs as long as one dischargeable battery does not operate at the maximum output power. Therefore, the situation that continuous discharge cannot be provided is avoided by setting the maximum output power which can be provided with services by the charging and replacing power station.
For example, the sum of the maximum output powers of all dischargeable batteries is calculated as the maximum output total power of the current charging and converting station, and then 60% -80% of the current maximum output total power is reported as the sustainable discharge power, so that the power grid determines whether to issue the discharge demand based on the sustainable discharge power. Therefore, when the charging and replacing power station provides the discharging service, the required power of a power grid can be met, power margins are almost reserved in the discharging process of each dischargeable battery, and the existence of the power margins can not influence the continuous discharging capacity of the whole power station when the first discharging power of each dischargeable battery is properly increased or reduced. In fact, when the charging and converting station participates in power grid interaction, the total output power of the charging and converting station is generally allowed to fluctuate within a certain range (for example, 0.8-1.2) above and below the reported value, and in order not to interrupt discharging, the total output power can be slightly reduced within the allowable fluctuation range.
The ratio between the sustainable discharge power and the maximum total output power may be determined empirically or experimentally. For example, the value can be set to allow a maximum of 2-3 batteries to be discharged to the discharge cutoff SOC, and the whole station can also provide the continuous discharge capability.
Of course, the above calculation method of the sustainable discharge power is not exclusive, and those skilled in the art may also estimate the maximum total output power directly, as long as a reasonable sustainable discharge power can be determined.
By calculating the maximum output total power of all dischargeable batteries and calculating and reporting the sustainable discharge power based on the maximum output total power, the service capability of the current charging and replacing station can be evaluated and reported, and the problem that the whole station cannot provide the sustainable discharge service due to overhigh required power is avoided.
In one embodiment, the control method further comprises: when one dischargeable battery is discharged from the current charge state to the discharge cut-off charge state, the first discharge power of all other dischargeable batteries is increased; and controlling the battery replacement unit to replace the battery on the vehicle with the battery discharged to the discharge cut-off state of charge.
For example, taking the first dischargeable battery as an example, after the first dischargeable battery discharges to the discharge cutoff SOC, if the reverse battery replacement vehicle has reached the battery charging station, the battery replacement unit may be controlled to perform reverse battery replacement on the vehicle, and the high SOC battery on the vehicle and the first dischargeable battery are replaced, so that the replaced original SOC battery participates in the discharge service. In the reverse battery replacement process, the first dischargeable battery stops discharging, so that the total output power of the whole station is reduced, and the required power of a power grid cannot be achieved. At this time, the power of all the rest dischargeable batteries is controlled to be increased, so that the power required by the user, such as the total output power of the whole station, continues to be discharged outwards. The power of the first dischargeable battery may be equally distributed to the remaining dischargeable batteries, or may be distributed according to the current SOC ratios of the remaining dischargeable batteries, and a specific distribution manner is adopted, which is not limited in the present application.
After the batteries on the vehicle are replaced in the battery compartment, the main control unit may re-determine each first discharge power based on the current electric quantity of each dischargeable battery, or may re-calculate the remaining required electric energy and the current total discharge electric energy of the dischargeable batteries based on the remaining discharge time (the required time minus the discharged time), and compare the remaining required electric energy with the current total discharge electric energy to determine which discharge mode to use.
When one dischargeable battery is discharged to a discharge cut-off state of charge, the first discharge power of all other dischargeable batteries is increased, so that the total output power can still be kept to meet the requirement in the battery replacement process, and continuous discharge is realized.
It should be noted that, although the foregoing embodiment is described with reference to a specific reverse battery replacement scheduling method, this is not intended to limit the protection scope of the present application, in other alternative embodiments, when a reverse battery replacement request is issued, the required number and the required battery replacement time may not be issued, and accordingly, it is not necessary to control all the dischargeable batteries to discharge sequentially according to a preset interval duration, but only the scheduling request is issued, when the vehicle responds to the request, the remaining power amount when the vehicle reaches the battery replacement station and the predicted arrival time are determined, and the battery replacement station adjusts the discharge power accordingly to meet the requirement of continuously replacing the battery. However, in this manner, although the sustained discharge can also be achieved, the arrival time of the vehicle has a large randomness, and it may cause difficulty in smoothing the discharge power, or may cause interruption of the discharge.
One possible control procedure of the present application is described below with reference to fig. 3. Fig. 3 is a logic diagram of a possible implementation of the control method for a charging and swapping power station according to the present application.
As shown in fig. 3, in one possible embodiment:
s201, obtaining the discharging demand information.
S202, analyzing the discharging demand information to obtain demand power Preq and demand duration Treq.
S203, calculates the required electric energy Qreq ═ Preq × Treq.
And S204, calculating the total discharge electric energy Qa of the dischargeable battery according to the formula (1).
S205, determine if Qa ≧ Qreq? If so, executing S212; otherwise, if not, S206 is executed.
And S206, determining a first discharge power P1_ i of each dischargeable battery according to the above formulas (2) and (3), controlling each dischargeable battery to start discharging from the current SOC at the respective first discharge power, and discharging to the discharge cut-off SOC at equal preset interval time delta T.
And S207, calculating an electric energy notch Qdiff according to the formula (4), and calculating the fastest discharge time T0 according to the formula (6).
And S208, calculating the required quantity according to the formula (5), and determining the required battery replacement time based on the fastest discharge time T0 and the preset interval duration delta T.
And S209, sending the required quantity and the required battery replacement time to the cloud server so that the cloud server can send the required quantity and the required battery replacement time to vehicles near the battery charging and replacement station, and the vehicles can respond to the reverse battery replacement requirement.
S210, when a vehicle responds to a reverse battery replacement demand, determining a second estimated arrival time T1 of the vehicle which arrives at the battery charging and replacing station fastest based on the reverse battery replacement demand, and adjusting the first discharging power of each dischargeable battery according to the formula (7) when the second estimated arrival time is later than the fastest discharging time T0. Meanwhile, the required power change time is adjusted based on the fastest discharge time, and the required quantity is adjusted based on the estimated residual electric quantity of the response vehicle after the station arrives.
And S211, after the vehicle arrives at the station, controlling the battery replacement unit to reversely replace the vehicle, and exchanging the high-SOC battery on the vehicle with the dischargeable battery which is discharged to the discharging cut-off SOC. And returning to S202 after the battery replacement is finished, and recalculating the residual required electric energy based on the required power and the residual discharge time.
S212, a second discharging power P2 — i of each dischargeable battery is determined according to the above equation (8) and the second distribution strategy.
And S213, controlling the dischargeable batteries to start discharging from the current SOC at the respective second discharging power, and counting the discharging time length T.
S214, judging whether T is more than or equal to Treq? If yes, ending the program; otherwise, if not, returning to continue executing S213.
Although the foregoing embodiments describe the steps in the above sequential order, those skilled in the art can understand that, in order to achieve the effect of the present embodiments, the different steps need not be executed in such an order, and may be executed simultaneously (in parallel) or in an inverted order, and these simple changes are all within the scope of protection of the present application. For example, S107 and S109-S111 may be executed simultaneously or in reverse order.
Referring to fig. 4, a control system of the charging and replacing power station of the present application will be briefly described. Fig. 4 is a system diagram of a control system of the charging and swapping station of the present application.
As shown in fig. 4, a control system 100 of a charging and replacing power station of the present application includes: an acquisition module 110, a determination module 120, a calculation module 130, a comparison module 140, a transmission module 150, and a control module 160. The obtaining module 110 is configured to obtain the discharging requirement information; the determination module 120 is configured to determine the required electric energy based on the discharging requirement information; the calculation module 130 is configured to calculate a total discharge electric energy that can be provided by all the dischargeable batteries in the charging and replacing station; the comparison module 140 is configured to compare the magnitude of the required electric energy with the total discharge electric energy; the sending module 150 is configured to send the reverse battery replacement demand information to the outside when the demand electric energy is greater than the total discharge electric energy, so that a vehicle responding to the reverse battery replacement demand information arrives at the battery charging and replacing station to perform reverse battery replacement; the determination module 120 is further configured to determine a first discharge power of each dischargeable battery based on the discharge demand information and the first allocation policy; the control module 160 is configured to control each dischargeable battery to discharge outward at a respective first discharge power. In one embodiment, the detailed implementation functions may be described with reference to S101-S111.
In one embodiment, the first allocation policy is: when all the dischargeable batteries are discharged externally with respective first discharge power, the batteries can be discharged from the current charge state to a discharge cut-off charge state sequentially according to equal preset interval duration; the preset interval duration is longer than the duration required by reverse battery replacement of the vehicle. In one embodiment, the specific functions are described in the method steps.
In one embodiment, the calculation module 130 is further configured to calculate an electric energy gap according to the demanded electric energy and the total discharge electric energy, calculate a fastest discharge time for all the dischargeable batteries to be discharged from the current state of charge to the discharge cutoff state of charge at the respective first discharge powers; calculating the required number of vehicles needing reverse battery replacement and the required battery replacement time of each vehicle needing to arrive based on the electric energy gap and the fastest discharge time; the sending module 150 is further configured to send the required quantity and the required battery replacement time to the outside. In one embodiment, the specific functions are described in the method steps.
In one embodiment, the required battery replacement time is determined based on the fastest discharge time and a preset interval duration. In one embodiment, the specific functions are described in the method steps.
In one embodiment, the obtaining module 110 is further configured to obtain a status parameter of the vehicle; the calculation module 130 is further configured to calculate a first estimated arrival time of the vehicle based on the state parameter; the determination module 120 is further configured to determine a suggested power change time based on the first estimated arrival time and the required power change time; the sending module 150 is further configured to issue a response recommendation based on the recommended battery swapping time. In one embodiment, the specific functions are described in the method steps.
In one embodiment, the obtaining module 110 is further configured to obtain the demand response information; the determination module 120 is further configured to determine a second estimated arrival time of the vehicle; the control module 160 is further configured to adjust the first discharge power of each dischargeable battery based on the second estimated arrival time. In one embodiment, the specific functions are described in the method steps.
In one embodiment, the control module 160 is further configured to adjust the first discharge power of each dischargeable battery based on the second estimated arrival time by: calculating the fastest discharge time of all dischargeable batteries from the current charge state to the discharge cut-off charge state at respective first discharge power; judging whether the estimated station arrival time is later than the fastest discharge time; if so, adjusting the first discharge power of each dischargeable battery based on the second estimated arrival time. In one embodiment, the specific functions are described in the method steps.
In one embodiment, the control module 160 is further configured to adjust the first discharge power of each dischargeable battery based on the second estimated arrival time by: the first discharge power is adjusted by the following formula:
P1_i＝(SOC_i-SOC_end)×Qrated_i/[T1+(i-1)ΔT-Tn]
wherein, P1 — i is the first discharge power of the ith dischargeable battery; SOC _ i is the current state of charge of the ith dischargeable battery; SOC _ end is the discharge cutoff state of charge of the dischargeable battery; qrated _ i is the rated capacity of the i-th dischargeable battery; t1 is the second estimated arrival time; tn is the current time; delta T is a preset interval duration; n, n is the number of dischargeable cells. In one embodiment, the specific functions are described in the method steps.
In one embodiment, the control module 160 is further configured to adjust the required battery replacement time based on the second estimated arrival time; and/or the calculation module 130 is further configured to estimate a remaining capacity of the vehicle when it arrives at the charging station, the control module 160 is further configured to adjust the required amount based on the remaining capacity. In one embodiment, the specific functions are described in the method steps.
In one embodiment, the discharging demand information includes a demand power and a demand duration, and the determining module 120 is further configured to determine a second discharging power of each dischargeable battery based on the demand power and a second distribution policy when the demand power is less than or equal to the total discharging power; the control module 160 is further configured to control each dischargeable battery to discharge externally at a respective second discharge power; the comparison module 140 is further configured to determine whether the total discharge time period reaches the required time period; the control module 160 is further configured to control each dischargeable battery to end discharging when the discharging time reaches the demand time. In one embodiment, the specific functions are described in the method steps.
In one embodiment, the control system 100 further comprises: the calculation module 130 is further configured to calculate a maximum total output power of all dischargeable batteries within the charging station; calculating sustainable discharge power based on the maximum total output power; the sending module 150 is further configured to report the sustainable discharge power; wherein the sustainable discharge power is less than the maximum total output power. In one embodiment, the specific functions are described in the method steps.
In one embodiment, the control module 160 is further configured to increase the first discharge power of all other dischargeable batteries when one dischargeable battery is discharged from the current state of charge to the discharge cutoff state of charge; the control module 160 is further configured to control the battery replacement unit to replace the battery on the vehicle with a battery that is discharged to a discharge cut-off state of charge. In one embodiment, the specific functions are described in the method steps.
It should be noted that, the power control system 100 provided in the foregoing embodiment is illustrated by only dividing the functional modules (such as the obtaining module 110, the determining module 120, the calculating module 130, the comparing module 140, the sending module 150, and the control module 160, etc.), and in practical applications, the functional modules may be completed by different functional units according to needs, that is, the functional modules in this embodiment are further decomposed or combined, for example, the functional modules in the foregoing embodiment may be combined into one functional module, or may be further split into multiple sub-modules, so as to complete all or part of the functions described above. The names of the functional modules referred to in the present embodiment are for distinction only and are not to be construed as an improper limitation of the present application.
It will be understood by those skilled in the art that all or part of the flow of the method of the above-mentioned embodiment may be implemented by a computer program, which may be stored in a computer-readable storage medium and used for instructing relevant hardware, and when the computer program is executed by a processor, the steps of the above-mentioned method embodiments may be implemented. Wherein the computer program comprises computer program code, which may be in the form of source code, object code, an executable file or some intermediate form, etc. The computer-readable storage medium may include: any entity or device capable of carrying computer program code, media, U-disk, removable hard disk, magnetic disk, optical disk, computer memory, read-only memory, random access memory, electrical carrier wave signals, telecommunications signals, software distribution media, and the like. It should be noted that the computer readable storage medium may contain content that is subject to appropriate increase or decrease as required by legislation and patent practice in jurisdictions, for example, in some jurisdictions, computer readable storage media that does not include electrical carrier signals and telecommunications signals in accordance with legislation and patent practice.
The various component embodiments of the invention may be implemented in hardware, or in software modules running on one or more processors, or in a combination thereof. Those skilled in the art will appreciate that a microprocessor or Digital Signal Processor (DSP) may be used in practice to implement some or all of the functions of some or all of the components in a server, client, or the like, according to embodiments of the present invention. The present invention may also be embodied as an apparatus or device program (e.g., PC program and PC program product) for carrying out a portion or all of the methods described herein. Such a program implementing the invention may be stored on a PC readable medium or may be in the form of one or more signals. Such a signal may be downloaded from an internet website or provided on a carrier signal or in any other form.
The present application further provides a computer-readable storage medium. In one computer-readable storage medium embodiment according to the present application, a computer-readable storage medium may be configured to store a program for executing the control method of the charging and replacing power station of the above-described method embodiment, and the program may be loaded and executed by a processor to implement the control method of the above-described charging and replacing power station. For convenience of explanation, only the parts related to the embodiments of the present invention are shown, and details of the specific techniques are not disclosed. The computer readable storage medium may be a storage device formed by including various electronic devices, and optionally, the computer readable storage medium is a non-transitory computer readable storage medium in the embodiment of the present invention.
The application also provides a control device. In an embodiment of the control device according to the application, the control device comprises a processor and a memory, the memory may be configured to store a program for executing the control method of the charging and swapping station of the above-mentioned method embodiment, and the processor may be configured to execute the program in the memory, the program including but not limited to the program for executing the control method of the charging and swapping station of the above-mentioned method embodiment. For convenience of explanation, only the parts related to the embodiments of the present invention are shown, and details of the specific techniques are not disclosed. The control device may be a device apparatus formed including various electronic apparatuses.
The application also provides a charging and replacing power station which comprises the control device of the embodiment.
So far, the technical solutions of the present application have been described in connection with the preferred embodiments shown in the drawings, but it is easily understood by those skilled in the art that the scope of the present application is obviously not limited to these specific embodiments. Equivalent changes or substitutions of related technical features can be made by those skilled in the art without departing from the principle of the present application, and the technical scheme after the changes or substitutions will fall into the protection scope of the present application.

Claims (10)

1. A control method of a charging and battery replacing station is characterized in that the charging and battery replacing station comprises a battery replacing unit and a plurality of battery bins, the battery bins are used for charging and discharging batteries, the battery replacing unit is used for replacing the batteries for vehicles, the battery bins are connected with a power utilization part through a bidirectional charging and discharging module,
the control method comprises the following steps:
acquiring discharge demand information, and determining demand electric energy based on the discharge demand information;
calculating total discharge electric energy which can be provided by all dischargeable batteries in the charging and replacing station;
comparing the required electric energy with the total discharge electric energy;
when the required electric energy is larger than the total discharge electric energy, reverse battery replacement requirement information is sent outwards so that a vehicle responding to the reverse battery replacement requirement information arrives at the battery charging and replacing station to perform reverse battery replacement;
determining a first discharge power of each dischargeable battery based on the discharge demand information and a first allocation strategy;
and controlling each dischargeable battery to discharge outwards according to the respective first discharge power.
2. The control method for the charging and swapping station as claimed in claim 1, wherein the first allocation policy is:
when all the dischargeable batteries are discharged externally with respective first discharge power, the batteries can be discharged from the current charge state to a discharge cut-off charge state sequentially according to equal preset interval duration;
and the preset interval duration is longer than the duration required by reverse battery replacement of the vehicle.
3. The control method for the charging and replacing power station according to claim 2, further comprising:
calculating an electric energy gap according to the required electric energy and the total discharge electric energy;
calculating the fastest discharge time of all dischargeable batteries from the current charge state to the discharge cut-off charge state at respective first discharge power;
calculating the required number of vehicles needing reverse battery replacement and the required battery replacement time of each vehicle needing to arrive based on the electric energy notch and the fastest discharge time;
the step of sending the reverse battery replacement requirement information outwards further comprises the following steps:
and sending the required quantity and the required battery replacement time outwards.
4. The control method of the charging and swapping station as claimed in claim 3, wherein the required swapping time is determined based on the fastest discharging time and the preset interval duration.
5. The control method for the charging and replacing power station according to claim 3, further comprising:
acquiring state parameters of a vehicle, and calculating first estimated arrival time of the vehicle based on the state parameters;
determining suggested power change time based on the first estimated arrival time and the required power change time;
and sending out a response suggestion based on the suggested battery replacement time.
6. The control method for the charging and replacing power station according to any one of claims 1 to 5, further comprising:
acquiring demand response information, and determining second estimated arrival time of the next arrival vehicle;
adjusting a first discharge power of each dischargeable battery based on the second estimated arrival time.
7. The method for controlling a charging station according to claim 6 when dependent on claim 3 or 4, wherein the step of adjusting the first discharging power of each dischargeable battery based on the second estimated arrival time further comprises:
judging whether the second estimated arrival time is later than the fastest discharge time;
if so, adjusting the first discharge power of each dischargeable battery based on the second estimated arrival time.
8. The method for controlling a charging station according to claim 7, wherein the step of adjusting the first discharging power of each dischargeable battery based on the second estimated arrival time further comprises:
adjusting the first discharge power by the following formula:
P1_i＝(SOC_i-SOC_end)×Qrated_i/[T1+(i-1)ΔT-Tn]
wherein, P1 — i is the first discharge power of the ith dischargeable battery; SOC _ i is the current state of charge of the ith dischargeable battery; SOC _ end is the discharge cutoff state of charge of the dischargeable battery; qrated _ i is the rated capacity of the i-th dischargeable battery; t1 is the second estimated arrival time; tn is the current time; delta T is a preset interval duration; n, n is the number of dischargeable cells.
9. The control method for the charging and replacing power station as claimed in claim 7, wherein after the step of "adjusting the first discharging power of each dischargeable battery", the control method further comprises:
adjusting the required battery replacement time based on the second estimated arrival time; and/or
Estimating a remaining capacity of the vehicle when the vehicle reaches the charging and replacing station, and adjusting the required quantity based on the remaining capacity.
10. The control method for the charging and replacing power station according to claim 1, wherein the discharging demand information includes a demand power and a demand duration, and the control method further includes:
when the required electric energy is less than or equal to the total discharge electric energy, determining a second discharge power of each dischargeable battery based on the required power and a second distribution strategy;
controlling each dischargeable battery to discharge externally according to respective second discharge power;
judging whether the total discharge time length reaches the required time length or not;
and when the discharge time reaches the required time, controlling each dischargeable battery to finish discharging.
CN202210471310.6A 2022-04-28 2022-04-28 Control method, system, medium and device for charging and replacing power station and charging and replacing power station Pending CN114851900A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN202210471310.6A CN114851900A (en) 2022-04-28 2022-04-28 Control method, system, medium and device for charging and replacing power station and charging and replacing power station

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN202210471310.6A CN114851900A (en) 2022-04-28 2022-04-28 Control method, system, medium and device for charging and replacing power station and charging and replacing power station

Publications (1)

Publication Number Publication Date
CN114851900A true CN114851900A (en) 2022-08-05

Family

ID=82634570

Family Applications (1)

Application Number Title Priority Date Filing Date
CN202210471310.6A Pending CN114851900A (en) 2022-04-28 2022-04-28 Control method, system, medium and device for charging and replacing power station and charging and replacing power station

Country Status (1)

Country Link
CN (1) CN114851900A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN117578549A (en) * 2024-01-17 2024-02-20 中能聚创(杭州)能源科技有限公司 Cooperative control method for charging pile and energy storage equipment
WO2024092464A1 (en) * 2022-10-31 2024-05-10 宁德时代新能源科技股份有限公司 Battery mixed-use system and control method and control apparatus therefor, and storage medium

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2024092464A1 (en) * 2022-10-31 2024-05-10 宁德时代新能源科技股份有限公司 Battery mixed-use system and control method and control apparatus therefor, and storage medium
CN117578549A (en) * 2024-01-17 2024-02-20 中能聚创(杭州)能源科技有限公司 Cooperative control method for charging pile and energy storage equipment
CN117578549B (en) * 2024-01-17 2024-04-30 中能聚创(杭州)能源科技有限公司 Cooperative control method for charging pile and energy storage equipment

Similar Documents

Publication Publication Date Title
US7657438B2 (en) Method for controlling vehicular electric system
CN114851900A (en) Control method, system, medium and device for charging and replacing power station and charging and replacing power station
CN102255350B (en) Charging device, charging controlling unit, charging controlling method, and charging receiving method
JP5214764B2 (en) Electric vehicle charging scheduling system
US10389165B2 (en) Energy management apparatus, energy management method and program recording medium
CN104011967B (en) Electricity needs adjusts system, electricity needs adjusting apparatus and electricity needs method of adjustment
CN104160546A (en) Method, system and charger for charging a battery of an electric vehicle
US20140015319A1 (en) Charged power control system
CN114069802A (en) Power control method, system, medium and device for charging and replacing power station and charging and replacing power station
CN109378879B (en) Charging station power control method and system
US20130229057A1 (en) Control apparatus
US20210021134A1 (en) Storage system
JP7455531B2 (en) Charging control device and its method, program; Charging management device, its method, program
EP4194256A1 (en) Power control method and system for battery charging and swap station, medium, apparatus, and battery charging and swap station
JP7257917B2 (en) power management system
EP3073597A1 (en) Storage battery control device, control method, control program, and electricity storage system
US10581122B2 (en) Charge and discharge control apparatus and method for an energy storage that provides multiple services
CN115952975A (en) Charging pile group power regulation method, system, equipment and medium
CN109460870B (en) Cluster electric automobile interaction method considering blocking
CN116729188B (en) Method and system for distributing multi-section power of direct current charging pile
JP2020182330A (en) Vehicle charging device
CN111361443A (en) Charging control method and device for photovoltaic charging station
CN108462195B (en) Virtual energy storage capacity distribution method and system for electric automobile
CN113910962B (en) Charging pile charging method, device and medium
CN113602127B (en) Charging pile energy management method and device

Legal Events

Date Code Title Description
PB01 Publication
PB01 Publication
SE01 Entry into force of request for substantive examination
SE01 Entry into force of request for substantive examination